Sensor device and method for detecting cell density based on turbidimetry

The invention relates to the technical field of all-optical detection equipment, in particular to a sensor device and method for detecting cell density based on turbidimetry, and the sensor device comprises an immersion probe and a signal excitation and detection unit. Wherein the immersion type probe comprises an incident optical fiber collimator, an emergent optical fiber collimator, a collimator fixing piece, a sample chamber and a reflecting mirror module, and an optical signal is transmitted into the sample chamber through the incident optical fiber collimator and then is totally reflected to the emergent optical fiber collimator through the reflecting mirror module; the signal excitation and detection unit comprises an excitation light source, an optical fiber coupler, a light source driving module, a first photoelectric conversion module for monitoring the power of the excitation light source, a second photoelectric conversion module for detecting the output light power of the emergent optical fiber co